After a long time of replacing parts and troubleshooting, finally solved my stumbling problems at low rpm at high loads.


Two problems, one was my A/F ratio guage was screwing up the signal wire to the PCM, the PCM never thru a code but it made the car pull timing and break up a little bit, and also run rich.

Second problem, My ignition box was wet and/or defective and caused a low end stumble.

For other people with stumbling problems, check your signal wire for your 02 sensors to make sure there isn't any noise on them.

I replaced many parts trying to fix this problem like the opti, wires, plugs, icm, coil, egr blockoff, etc.

Brian

 

How would you check ... with a multimeter, scanner , etc ?


What would you look for ?? What should one look for to tell if there is noise (interference)?